| Verification Method | Description | 
|---|---|
| Demonstration | Verification by observation of expected external behaviour during system operation. Demonstration verifies conformance to requirements by exercising a sample of observable functional operations. | 
| Analysis | Analysis verifies conformance to requirements by technical evaluation, processing, review or study of accumulated data. It can include a review of test outputs versus test inputs, technical evaluation, mathematical evaluation, and simulation | 
| Inspection | Inspection verifies conformance to requirements by visual examination, reviewing descriptive documentation, and comparing characteristics with predetermined criteria. | 
| Manual Test | Special modifications to the code under test to capture information not normally retained in the course of operations. Manual testing verifies conformance to requirements by exercising observable functional operations in a manual fashion. Testing is generally more extensive than the exercises performed using the demonstration method and is appropriate for requirements fulfilled by developmental items. | 
| Automated Test | Automated testing verifies conformance to requirements by exercising observable functional operations in an automated fashion. | 
| Certification | Certification verifies conformance to requirements by examination of vendor (or supplier) documentation attesting that the product was developed and tested in accordance with the vendor’s internal standards. | 
[Source]
Also See:
Verification & Validation Definition
Verification & Validation Examples